Common service name and port number, name port number

Common service name and port number, name port number

Port name port number/protocol alias

Ftp 21/tcp

Telnet 23/tcp

Smtp 25/tcp mail

Nicename 43/tcp whois

 

Domain 53/tcp nameserver

 

Domain 53/udp nameserver

 

Finger 79/tcp

Http 80/tcp www-http

 

Pop3 110/tcp pop-3

 

Auth 113/tcp authentication tap ident

 

Nntp 119/tcp readnews untp

 

Ntp 123/tcp

 

HTTP 443/tcp

 

 

 

 

 

Reference: Linux Firewall 3rd